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TI-2026-54235 Aliases CVE-2026-77906GHSA-8834-2x42-5wxx

Visual Studio Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00819 57th percentileScored 2026-11-07
Fix Fixed Microsoft Visual Studio 2026 version 18.9 (Microsoft): 18.9.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Visual Studio 2026 version 18.918.9.0 to before 18.9.318.9.3Patch availableCNA
  • Microsoft Visual Studio 2026 version 18.9 VendorMicrosoft Affected 18.9.0 to before 18.9.3 Fixed in 18.9.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*18.9.0 to before 18.9.3VulnerableMicrosoft
  • cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* Versions 18.9.0 to before 18.9.3 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Visual Studio 2026 version 18.9 (Microsoft) Fixed in 18.9.3

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Visual Studio 2026 version 18.9Fixed 18.9.3 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77906
  2. 2026-10-03 Alias added: GHSA-8834-2x42-5wxx

References

Patch 1

  • TI-2026-72884 Request smuggling in ASP.NET Core lets attackers tamper with traffic CVSS 3.1CRITICAL 9.4
  • TI-2026-33337 ASP.NET Core Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2026-37338 .NET Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2026-37335 .NET Framework Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2026-37262 .NET Security Feature Bypass Vulnerability CVSS 3.1HIGH 8.2
  • TI-2026-34881 .NET Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.8
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences